<!DOCTYPE html>
<html>
    <head>
        <title>网页标题</title>
    </head>
    <body>
        <h1>h1标题</h1>
        <h2>h2标题</h2>
        <h3>h3标题</h3>
        <h4>h4标题</h4>
        <h5>h5标题</h5>
        <h6>h6标题</h6>
    </body>
</html>